fix bugs and make it run basically

pkg/port/iscsit/iscsit.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2015 The GoStor Authors All rights reserved.
+Copyright 2016 The GoStor Authors All rights reserved.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -17,11 +17,38 @@ limitations under the License.
 // iSCSI Target Driver
 package iscsit
 
-import (
-	"github.com/gostor/gotgt/pkg/api"
-	"github.com/gostor/gotgt/pkg/util"
+import "github.com/gostor/gotgt/pkg/api"
+
+const (
+	IOSTATE_FREE = iota
+
+	IOSTATE_RX_BHS
+	IOSTATE_RX_INIT_AHS
+	IOSTATE_RX_AHS
+	IOSTATE_RX_INIT_HDIGEST
+	IOSTATE_RX_HDIGEST
+	IOSTATE_RX_CHECK_HDIGEST
+	IOSTATE_RX_INIT_DATA
+	IOSTATE_RX_DATA
+	IOSTATE_RX_INIT_DDIGEST
+	IOSTATE_RX_DDIGEST
+	IOSTATE_RX_CHECK_DDIGEST
+	IOSTATE_RX_END
+
+	IOSTATE_TX_BHS
+	IOSTATE_TX_INIT_AHS
+	IOSTATE_TX_AHS
+	IOSTATE_TX_INIT_HDIGEST
+	IOSTATE_TX_HDIGEST
+	IOSTATE_TX_INIT_DATA
+	IOSTATE_TX_DATA
+	IOSTATE_TX_INIT_DDIGEST
+	IOSTATE_TX_DDIGEST
+	IOSTATE_TX_END
 )
 
+var ISCSI_OPCODE_MASK = 0x3F
+
 type ISCSIDiscoveryMethod string
 
 var (
@@ -38,7 +65,7 @@ type ISCSIRedirectInfo struct {
 }
 
 type ISCSITarget struct {
-	*api.SCSITarget
+	api.SCSITarget
 	api.SCSITargetDriverCommon
 
 	Sessions     []*ISCSISession
@@ -51,9 +78,9 @@ type ISCSITarget struct {
 	NopCount     int
 }
 
-func NewISCSITarget(target *api.SCSITarget) *ISCSITarget {
+func newISCSITarget(target *api.SCSITarget) *ISCSITarget {
 	return &ISCSITarget{
-		SCSITarget: target,
+		SCSITarget: *target,
 	}
 }
 
@@ -91,96 +118,3 @@ func (tgt *ISCSITarget) GetLu(lun uint8) (uint64, error) {
 func (tgt *ISCSITarget) CommandNotify(nid uint64, result int, cmd *api.SCSICommand) error {
 	return nil
 }
-func (tgt *ISCSITarget) ProcessCommand(buf []byte) ([]byte, error) {
-	b := make([]byte, 48) // TODO: sync.Pool
-	b = buf[0:48]
-	m, err := parseHeader(b)
-	if err != nil {
-		return nil, err
-	}
-	m.RawHeader = b
-	if m.DataLen > 0 {
-		m.RawData = buf[48:m.DataLen]
-	}
-	resp := &ISCSICommand{}
-	switch m.OpCode {
-	case OpLoginReq:
-		resp = &ISCSICommand{
-			OpCode:   OpLoginResp,
-			Transit:  true,
-			NSG:      FullFeaturePhase,
-			StatSN:   m.ExpStatSN,
-			TaskTag:  m.TaskTag,
-			ExpCmdSN: m.CmdSN,
-			MaxCmdSN: m.CmdSN,
-			RawData: util.MarshalKVText(map[string]string{
-				"HeaderDigest": "None",
-				"DataDigest":   "None",
-			}),
-		}
-		break
-	case OpLogoutReq:
-		resp = &ISCSICommand{
-			OpCode:   OpLogoutResp,
-			StatSN:   m.ExpStatSN,
-			TaskTag:  m.TaskTag,
-			ExpCmdSN: m.CmdSN,
-			MaxCmdSN: m.CmdSN,
-		}
-	case OpSCSICmd:
-		resp = &ISCSICommand{
-			OpCode:   OpSCSIResp,
-			Final:    true,
-			StatSN:   m.ExpStatSN,
-			TaskTag:  m.TaskTag,
-			ExpCmdSN: m.CmdSN + 1,
-			MaxCmdSN: m.CmdSN + 10,
-		}
-		switch api.SCSICommandType(m.CDB[0]) {
-		case api.TEST_UNIT_READY:
-			// test unit ready
-			resp.Status = api.SAM_STAT_GOOD
-			resp.SCSIResponse = 0x01
-			break
-		case api.READ_CAPACITY:
-			resp.OpCode = OpSCSIIn
-			resp.HasStatus = true
-			var data []byte
-			data = append(data, MarshalUint64(uint64(0))[4:]...)
-			data = append(data, MarshalUint64(uint64(0))[4:]...)
-			resp.RawData = data
-			break
-		case api.SERVICE_ACTION_IN:
-			resp.OpCode = OpSCSIIn
-			resp.HasStatus = true
-			sa := m.CDB[1] & 0x1f
-			switch sa {
-			case 0x10:
-				c := &Capacity{}
-				resp.RawData = c.bytes()
-			}
-			break
-		case api.INQUIRY:
-			resp.OpCode = OpSCSIIn
-			resp.HasStatus = true
-			alloc := int(ParseUint(m.CDB[3:5]))
-			inq := &InquiryData{
-				Vendor:        [8]byte{'1', '1', 'c', 'a', 'n', 's'},
-				Product:       [16]byte{'c', 'o', 'f', 'f', 'e', 'e'},
-				RevisionLevel: [4]byte{'1', '.', '0'},
-				SerialNumber:  52,
-			}
-
-			if len(inq.bytes()) >= alloc {
-				resp.RawData = inq.bytes()[:alloc]
-			} else {
-				resp.RawData = inq.bytes()
-			}
-			break
-		default:
-			break
-		}
-	}
-	b1 := resp.Bytes()
-	return b1, nil
-}